sylvester



(No Model.) I

F. L. SYLVESTER.

PISTON WATER METER.

No. 389,262. Patented Sept. 11, 1888.

m h asses, 7% H UNITE STATES Price,

ATENT FRED l E-JYLVESTER, OF CHELSEA, MASSACHUSETTS, ASSIGNOR TO \V. ALLEN SYLVESTER, OF SAME PLACE.

PISTON WATER-=METER.

I .ESPECIFICATION forming part of Letters Patent No. 389.262. dated September 11, 1888.

Serial No. 260,814. (No model.)

To all whom it may concern.-

Be it known that I, FRED L. SYLvEs'rER, a citizen of the United States, and a resident of Chelsea, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Piston Tater-Meters, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in piston-meters, and particularly to automatic valve mechanism for the same, and it is carried out as follows, reference being had to the accompanying drawings, wherein Figure 1 represents a central longitudinal section of my improved meter, and Fig. 2 rep resents a central cross-section of the same. Fig. 3 represents a plan view of the bottom plate and the valve mechanism, and Fig. 4 represents a plan view of the ported valve carrier'supporting plate.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

a in Fig. 1 is the central water-chamber, and c a are the bored-out cylinders, as usual, constituting the shell of the meter.

1) and b are the heads secured to the ends, respectively, of the cylinder a and a, as usual.

0 and c are the reciprocating pistons, scoured to the piston rod or connection 0, as is common in piston-meters of this kind.

To the under side of the shell of the meter is secured in a suitable manner the bottom 5 plate, D, having exhaust-pipe D communicating with the perforated main slide-valveE by means of the exhaust-port d, and having supply-pipe D, with opening (1* leading to the central chamber, a, as shown in Fig. 2.

A and A are passages leading from the outer ends of the cylinders a a, respectively, to the respective passages D and D in the bottom plate, 1), which passages terminate as ports d and (1, respectively, in the top of the 5 bottom plate, D, as shown in Figs. 1, 2, and 3.

The main slide-valve E is automatically reciprocated in a plane at a right angle to the axis of the meter by means, as will hereinafter be described, so as to conduct theliquid from the central chamber, a, alternately to the outer ends of the cylinders a a, and from them to the exhaust D".

To the top of the bottom plate, D, is secured the stationary casing F, in which the reciprocating frame or block G is free to move forward and back in a line parallel with the axis of the meter. The under side of the casing F is properly finished, so as to serve as a seat for the top of the main slide-valve E, as shown in Figs. 1 and 2. The bottom of the casing F has two horizontal cored-out passages, F and f, the ends of which terminate, respectively, as ports F F" andff as shown in the draw ings, and arranged relative to each other, as shown in Fig. 4-, such ports and passages serving to alternately conduct the liquid l'rom the central chamber, a, to and from the ends of the valve'carricr I, that is movable in the same direction with and carries the main slidevalve E, as will hereinafter be described.

H is a cover secured to the top of the casing F in any suitable manner, and at a distance above the lower portion of said casing to permit the block G and valve-carrier I to move freely between said parts, as shown in Figs. 1 and 2. Like the casing F, the cover H has also two cored-out horizontal passages, Hand h, terminating in ports H H and h h, precisely like and located centrally above the respective ports F F"andff and for the same pn rpose.

The slidevalve L is provided with a vertical projection, 0, extending upward through a slotted perforatiomf, in the casing F,as shown, and the upper end of such projection c is made to enter a slot, t, in the valve-carrier I, as shown in Figs. 1, 2, and 3. The slot i in the valve-carrier l is made in a line parallel with the axis of the meter, and the slot f is made at a right angle thereto, as shown, to permit the valve carrier to be actuated by the reciprocating block G without changing theposition of the slide-valve E, and to cause the latter to partake of the motion of the valvecarrier when said valvecarrier is actuated and moved by the liquid-pressure from the central chamber, a, in a direction at a right angle to the axis of the meter.

The block G is actuated by the reciprocating pistons c 0", and has for this purpose arms or projections G G in its ends, preferably provided with elastic bunters g g, as shown in Figs. 1 and 3, although the latter may be dispensed with without departing from the essence of my invention. I

The ports F" f H h are made tapering, as shown in Fig. 4, for the purpose of causing the valve-carrierI to comegradually to astandstill as it reaches the end of its stroke in the direction in which it is reciprocated by the pressure of the liquid in the meter-chambera. This is accomplished by the valvecarrier gradually cutting off the liquid-pressure that actuates it as it passes by the said tapering ports, the said valve-carrier having for this purpose corner projections, I I, on its interior portion, as shown in Figs. 1, 2, and 3.

The operation of the apparatus is as follows: As the pistons o c reach the end of their stroke in an opposite direction to that indicated by arrows in Fig. 1, the piston 0 comes in contact with the hunter and forces the frame G and valve-carrier I to the position shown in Figs. 1, 2, 3, and during such motion the main slide'valve E remains stationary. This movement of the frame G opens the ports F H, admitting the liquid-pressure from the central chamber, a, through the passages F H and ports F and H" to one end of the valve-carrier I, causing it to move at a right angle to the axis of the meter to the position shown in Figs. 2 and 3, and thereby carrying the main slide-valve E with it to the position shown in Fig. 2, causing the outer end of cylinder a to be in communication with the main exhaust D by the medium of the passages A D, port d, the perforation in the main valve E, and exhaust-port d and also causing the outer end of the cylinder at to be in communication with the central chamber, a, by the medium of the port (1, passages D and A allowing the liquid-pressure from the supply-pipe D to force the pistons c 0 toward the right, as shown by arrows in Fig. 1. During this movement of the valve-carrier the water at the opposite end of it is exhausted through the portsf h, channels f h, and tapering portsj h, communicating with the slot f by means of the perforation through the valve-carrier, and through said slot f and main valve E to the exhaust-port d and main exhaust D, and during such motion of the valve-carrier the exhaust is gradually cut off by means of the tapering ports fh being covered by the inwardly-projecting corner I of the valvecarrier, thereby causing the valve-carrier to come to a gradual standstill without the aid of hunters. When the pistons c c reach the end of their stroke in the direction shown by arrows in Fig. 1, the pis ton 0 comes in contact with the bunter g and actuates the frame G and the valve-carrier I, causing the valve-carrier and valve E to be moved in an opposite direction to reverse the respective supply and exhaust, and so on.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure by letters patent and claim- 1. In a piston-meter, the frame or block G, having a reciprocating motion imparted to it by the pistons c c, and the valve-carrier I, arranged within said block and moved by it, as described, combined with the ported casing and cover F H and the main slide-valve E, constructed and arranged as and for the purpose set forth.

2. In a piston-meter, the following elements: a valve carrier inclosed within a reciproeating frame, said valve-carrier being coupled to the main slide-valve, and a ported shell or case, the whole being so constructed and arranged relative to the pistons and water-p ressure in the meter as to cause the said frame and valve-carrier to reciprocate in the direction of the axis of the meter by the movements of the piston, and to cause the valve-carrier to be reciprocated in a right angle to such piston movements by the liquid-pressure in the meter, substantially as set forth.

3. In a piston-meter, the stationary shell and coverF H, having portsf F and k H in their ends, and tapering ports f F and h H, as described, combined with the reciprocating frame G, actuated by the reciprocating pistons, and the valve-carrier I, arranged within said frame and actuated by it forward and back in the direction of the axis of the meter and at a right angle thereto by the liquidpressure in the meter in a manner, as described, so that the motion of the valve-carrier in one direction shall reverse the liquidpressure to it and its motion in a direction at a right angle thereto shall cause a gradual closing of the tapering portsf F h H, as and for the purpose set forth.

4.. In a piston-meter, a stationary ported case and cover, F H, a reciprocating frame, G, arranged within said case and cover, and a valve-carrier, I, coupled to the main slidevalve in a manner, as described, so as to cause the said slide-valve to remain stationary during the reciprocating motion of the frame and carrier in a direction parallel with the axis of the meter, and to impart a reciprocating motion to the valve and its carrier in a direction at a right angle to the axis of the meter by the liquid-pressure in the meter exerted against the ends of the valve-carrier, while its carrying-frame remains stationary, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 2d day of January, A. D. 1888.

FRED L. SYLV ESTER.

Witnesses:

ALBAN ANDBEN, HENRY GHADBOURN. 

